Illustration by Luis Grañena When Jeffrey Chao was studying for his master’s in computer science in the early 1990s, he would sometimes spend so many hours in the lab that he would return to a locked dormitory. After climbing through his dorm room window at 2 a.m., Chao, who was then at Shanghai Jiao Tong University, would wake up at 8 and do it all again. It was the beginning of a journey that led to the establishment of TP-Link, originally a Shenzhen-based manufacturer of computer networking e...